Munich has the strongest economy of any German city and the lowest unemployment rate of any German city. The city is also the economic centre of southern Germany. Munich is considered a global city and holds the headquarters of Siemens AG (electronics), BMW (car), MAN AG (truck manufacturer, engineering), Linde (gases), Allianz (insurance), Munich Re (re-insurance), and Rohde & Schwarz (electronics). The breakdown by cities proper (not metropolitan areas) of Global 500 cities listed Munich in 8th position. Munich is a centre for biotechnology, software and other service industries. Munich is also the home of the headquarters of many other large companies such as the aircraft engine manufacturer MTU Aero Engines, the injection molding machine manufacturer Krauss-Maffei, the camera and lighting manufacturer Arri, the semiconductor firm Infineon Technologies (headquartered in the suburban town of Neubiberg), lighting giant Osram, as well as the German or European headquarters of many foreign companies such as McDonald’s and Microsoft. Munich has significance as a financial centre (second only to Frankfurt), being home of HypoVereinsbank and the Bayerische Landesbank. It outranks Frankfurt though as home of insurance companies.